Loudspeaker



FIG. 1 is a perspective view of a loudspeaker showing my new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being a mirror image thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a side elevational view thereof, the opposite side elevational view being a mirror image thereof.

The broken line showings form no part of the claimed design. 

CLAIM The ornamental design for a loudspeaker, as shown and described. 